Studies on mechanisms for the maintenance of constant mutability: mutability and the resistance to mutagens.
D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects*; D006147:Guanine / Q000494:pharmacology*; D066298:In Vitro Techniques; D009153:Mutagens / Q000494:pharmacology*; D009154:Mutation; D009603:Nitroso Compounds / Q000494:pharmacology*; D014466:Ultraviolet Rays
D009153:Mutagens; D009603:Nitroso Compounds; D006147:Guanine